Manchester United have signed England Under-21 right-back Aaron Wan-Bissaka from Crystal Palace in a £50m deal.
The 21-year-old, who made his first-team debut for Palace last year, has agreed a five-year contract that will earn him up to £80,000 a week.
United are paying £45m up front, making Wan-Bissaka the club's fifth-biggest signing, behind Paul Pogba, Romelu Lukaku, Angel di Maria and Fred.
"It's an unbelievable feeling and an honour," Wan-Bissaka said.
Manchester United confirmed the signing on Saturday.
Manager Ole Gunnar Solskjaer said Wan-Bissaka was "one of the best upcoming defenders in the Premier League".
He added: "He has the right work ethic, talent and mentality to play for Manchester United and he fits exactly the type of player that we are looking to bring into the squad to help us improve and push on further."
The defender is the club's second summer recruit, after Wales international Daniel James, 21, joined from Swansea for £15m.
United have the option to extend Wan-Bissaka's five-year deal into a sixth year.
Wan-Bissaka, who has been on international duty this month at the European Under-21 Championship, joined Palace's academy when he was 11.
The defender was on £10,000 a week at Selhurst Park, the lowest-paid player in Palace's first-team squad.
His transfer was delayed by final negotiations between the clubs, which ended with the Eagles securing a 10% sell-on clause if Wan-Bissaka leaves United for more than £50m.
"We are immensely proud to have been part of Aaron's development as a player and a person," Crystal Palace chairman Steve Parish said.
Meanwhile, United are confident of agreeing a new long-term contract with striker Marcus Rashford.
The 21-year-old's current deal expires in 2020 and talks over an extension have been held over a number of months.
BBC Sport understands significant progress has been made over terms that would earn Rashford a substantial increase on his present salary, which has been reported to be around £80,000-a-week.
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